drivers/usb/gadget/s3c2410_udc.c

   1 /*
   2  * linux/drivers/usb/gadget/s3c2410_udc.c
   3  *
   4  * Samsung S3C24xx series on-chip full speed USB device controllers
   5  *
   6  * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
   7  *      Additional cleanups by Ben Dooks <ben-linux@fluff.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28 #include <linux/ioport.h>
  29 #include <linux/sched.h>
  30 #include <linux/slab.h>
  31 #include <linux/errno.h>
  32 #include <linux/init.h>
  33 #include <linux/timer.h>
  34 #include <linux/list.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/platform_device.h>
  37 #include <linux/clk.h>
  38 #include <linux/gpio.h>
  39
  40 #include <linux/debugfs.h>
  41 #include <linux/seq_file.h>
  42
  43 #include <linux/usb.h>
  44 #include <linux/usb/gadget.h>
  45
  46 #include <asm/byteorder.h>
  47 #include <asm/io.h>
  48 #include <asm/irq.h>
  49 #include <asm/system.h>
  50 #include <asm/unaligned.h>
  51 #include <mach/irqs.h>
  52
  53 #include <mach/hardware.h>
  54
  55 #include <plat/regs-udc.h>
  56 #include <plat/udc.h>
  57
  58
  59 #include "s3c2410_udc.h"
  60
  61 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  62 #define DRIVER_VERSION  "29 Apr 2007"
  63 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  64                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  65
  66 static const char               gadget_name[] = "s3c2410_udc";
  67 static const char               driver_desc[] = DRIVER_DESC;
  68
  69 static struct s3c2410_udc       *the_controller;
  70 static struct clk               *udc_clock;
  71 static struct clk               *usb_bus_clock;
  72 static void __iomem             *base_addr;
  73 static u64                      rsrc_start;
  74 static u64                      rsrc_len;
  75 static struct dentry            *s3c2410_udc_debugfs_root;
  76
  77 static inline u32 udc_read(u32 reg)
  78 {
  79         return readb(base_addr + reg);
  80 }
  81
  82 static inline void udc_write(u32 value, u32 reg)
  83 {
  84         writeb(value, base_addr + reg);
  85 }
  86
  87 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  88 {
  89         writeb(value, base + reg);
  90 }
  91
  92 static struct s3c2410_udc_mach_info *udc_info;
  93
  94 /*************************** DEBUG FUNCTION ***************************/
  95 #define DEBUG_NORMAL    1
  96 #define DEBUG_VERBOSE   2
  97
  98 #ifdef CONFIG_USB_S3C2410_DEBUG
  99 #define USB_S3C2410_DEBUG_LEVEL 0
 100
 101 static uint32_t s3c2410_ticks = 0;
 102
 103 static int dprintk(int level, const char *fmt, ...)
 104 {
 105         static char printk_buf[1024];
 106         static long prevticks;
 107         static int invocation;
 108         va_list args;
 109         int len;
 110
 111         if (level > USB_S3C2410_DEBUG_LEVEL)
 112                 return 0;
 113
 114         if (s3c2410_ticks != prevticks) {
 115                 prevticks = s3c2410_ticks;
 116                 invocation = 0;
 117         }
 118
 119         len = scnprintf(printk_buf,
 120                         sizeof(printk_buf), "%1lu.%02d USB: ",
 121                         prevticks, invocation++);
 122
 123         va_start(args, fmt);
 124         len = vscnprintf(printk_buf+len,
 125                         sizeof(printk_buf)-len, fmt, args);
 126         va_end(args);
 127
 128         return printk(KERN_DEBUG "%s", printk_buf);
 129 }
 130 #else
 131 static int dprintk(int level, const char *fmt, ...)
 132 {
 133         return 0;
 134 }
 135 #endif
 136 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
 137 {
 138         u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
 139         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
 140         u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
 141         u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
 142
 143         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
 144         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
 145         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
 146         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
 147         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
 148         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
 149         udc_write(0, S3C2410_UDC_INDEX_REG);
 150         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
 151         udc_write(1, S3C2410_UDC_INDEX_REG);
 152         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 153         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 154         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 155         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 156         udc_write(2, S3C2410_UDC_INDEX_REG);
 157         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 158         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 159         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 160         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 161
 162         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
 163                  "PWR_REG        : 0x%04X\n"
 164                  "EP_INT_REG     : 0x%04X\n"
 165                  "USB_INT_REG    : 0x%04X\n"
 166                  "EP_INT_EN_REG  : 0x%04X\n"
 167                  "USB_INT_EN_REG : 0x%04X\n"
 168                  "EP0_CSR        : 0x%04X\n"
 169                  "EP1_I_CSR1     : 0x%04X\n"
 170                  "EP1_I_CSR2     : 0x%04X\n"
 171                  "EP1_O_CSR1     : 0x%04X\n"
 172                  "EP1_O_CSR2     : 0x%04X\n"
 173                  "EP2_I_CSR1     : 0x%04X\n"
 174                  "EP2_I_CSR2     : 0x%04X\n"
 175                  "EP2_O_CSR1     : 0x%04X\n"
 176                  "EP2_O_CSR2     : 0x%04X\n",
 177                         addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
 178                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
 179                         ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
 180                         ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
 181                 );
 182
 183         return 0;
 184 }
 185
 186 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
 187                                          struct file *file)
 188 {
 189         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
 190 }
 191
 192 static const struct file_operations s3c2410_udc_debugfs_fops = {
 193         .open           = s3c2410_udc_debugfs_fops_open,
 194         .read           = seq_read,
 195         .llseek         = seq_lseek,
 196         .release        = single_release,
 197         .owner          = THIS_MODULE,
 198 };
 199
 200 /* io macros */
 201
 202 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
 203 {
 204         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 205         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
 206                         S3C2410_UDC_EP0_CSR_REG);
 207 }
 208
 209 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
 210 {
 211         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 212         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
 213 }
 214
 215 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
 216 {
 217         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 218         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
 219 }
 220
 221 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
 222 {
 223         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 224         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
 225 }
 226
 227 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
 228 {
 229         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 230         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
 231 }
 232
 233 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
 234 {
 235         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 236         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
 237 }
 238
 239 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
 240 {
 241         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 242
 243         udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
 244                                 | S3C2410_UDC_EP0_CSR_DE),
 245                         S3C2410_UDC_EP0_CSR_REG);
 246 }
 247
 248 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
 249 {
 250         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 251         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 252                                 | S3C2410_UDC_EP0_CSR_SSE),
 253                         S3C2410_UDC_EP0_CSR_REG);
 254 }
 255
 256 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
 257 {
 258         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 259         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 260                         | S3C2410_UDC_EP0_CSR_DE),
 261                 S3C2410_UDC_EP0_CSR_REG);
 262 }
 263
 264 /*------------------------- I/O ----------------------------------*/
 265
 266 /*
 267  *      s3c2410_udc_done
 268  */
 269 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 270                 struct s3c2410_request *req, int status)
 271 {
 272         unsigned halted = ep->halted;
 273
 274         list_del_init(&req->queue);
 275
 276         if (likely (req->req.status == -EINPROGRESS))
 277                 req->req.status = status;
 278         else
 279                 status = req->req.status;
 280
 281         ep->halted = 1;
 282         req->req.complete(&ep->ep, &req->req);
 283         ep->halted = halted;
 284 }
 285
 286 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 287                 struct s3c2410_ep *ep, int status)
 288 {
 289         /* Sanity check */
 290         if (&ep->queue == NULL)
 291                 return;
 292
 293         while (!list_empty (&ep->queue)) {
 294                 struct s3c2410_request *req;
 295                 req = list_entry (ep->queue.next, struct s3c2410_request,
 296                                 queue);
 297                 s3c2410_udc_done(ep, req, status);
 298         }
 299 }
 300
 301 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
 302 {
 303         unsigned i;
 304
 305         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
 306          * fifos, and pending transactions mustn't be continued in any case.
 307          */
 308
 309         for (i = 1; i < S3C2410_ENDPOINTS; i++)
 310                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
 311 }
 312
 313 static inline int s3c2410_udc_fifo_count_out(void)
 314 {
 315         int tmp;
 316
 317         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 318         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 319         return tmp;
 320 }
 321
 322 /*
 323  *      s3c2410_udc_write_packet
 324  */
 325 static inline int s3c2410_udc_write_packet(int fifo,
 326                 struct s3c2410_request *req,
 327                 unsigned max)
 328 {
 329         unsigned len = min(req->req.length - req->req.actual, max);
 330         u8 *buf = req->req.buf + req->req.actual;
 331
 332         prefetch(buf);
 333
 334         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 335                 req->req.actual, req->req.length, len, req->req.actual + len);
 336
 337         req->req.actual += len;
 338
 339         udelay(5);
 340         writesb(base_addr + fifo, buf, len);
 341         return len;
 342 }
 343
 344 /*
 345  *      s3c2410_udc_write_fifo
 346  *
 347  * return:  0 = still running, 1 = completed, negative = errno
 348  */
 349 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 350                 struct s3c2410_request *req)
 351 {
 352         unsigned        count;
 353         int             is_last;
 354         u32             idx;
 355         int             fifo_reg;
 356         u32             ep_csr;
 357
 358         idx = ep->bEndpointAddress & 0x7F;
 359         switch (idx) {
 360         default:
 361                 idx = 0;
 362         case 0:
 363                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 364                 break;
 365         case 1:
 366                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 367                 break;
 368         case 2:
 369                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 370                 break;
 371         case 3:
 372                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 373                 break;
 374         case 4:
 375                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 376                 break;
 377         }
 378
 379         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 380
 381         /* last packet is often short (sometimes a zlp) */
 382         if (count != ep->ep.maxpacket)
 383                 is_last = 1;
 384         else if (req->req.length != req->req.actual || req->req.zero)
 385                 is_last = 0;
 386         else
 387                 is_last = 2;
 388
 389         /* Only ep0 debug messages are interesting */
 390         if (idx == 0)
 391                 dprintk(DEBUG_NORMAL,
 392                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 393                         idx, count, req->req.actual, req->req.length,
 394                         is_last, req->req.zero);
 395
 396         if (is_last) {
 397                 /* The order is important. It prevents sending 2 packets
 398                  * at the same time */
 399
 400                 if (idx == 0) {
 401                         /* Reset signal => no need to say 'data sent' */
 402                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 403                                         & S3C2410_UDC_USBINT_RESET))
 404                                 s3c2410_udc_set_ep0_de_in(base_addr);
 405                         ep->dev->ep0state=EP0_IDLE;
 406                 } else {
 407                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 408                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 409                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 410                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 411                                         S3C2410_UDC_IN_CSR1_REG);
 412                 }
 413
 414                 s3c2410_udc_done(ep, req, 0);
 415                 is_last = 1;
 416         } else {
 417                 if (idx == 0) {
 418                         /* Reset signal => no need to say 'data sent' */
 419                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 420                                         & S3C2410_UDC_USBINT_RESET))
 421                                 s3c2410_udc_set_ep0_ipr(base_addr);
 422                 } else {
 423                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 424                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 425                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 426                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 427                                         S3C2410_UDC_IN_CSR1_REG);
 428                 }
 429         }
 430
 431         return is_last;
 432 }
 433
 434 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 435                 struct s3c2410_request *req, unsigned avail)
 436 {
 437         unsigned len;
 438
 439         len = min(req->req.length - req->req.actual, avail);
 440         req->req.actual += len;
 441
 442         readsb(fifo + base_addr, buf, len);
 443         return len;
 444 }
 445
 446 /*
 447  * return:  0 = still running, 1 = queue empty, negative = errno
 448  */
 449 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 450                                  struct s3c2410_request *req)
 451 {
 452         u8              *buf;
 453         u32             ep_csr;
 454         unsigned        bufferspace;
 455         int             is_last=1;
 456         unsigned        avail;
 457         int             fifo_count = 0;
 458         u32             idx;
 459         int             fifo_reg;
 460
 461         idx = ep->bEndpointAddress & 0x7F;
 462
 463         switch (idx) {
 464         default:
 465                 idx = 0;
 466         case 0:
 467                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 468                 break;
 469         case 1:
 470                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 471                 break;
 472         case 2:
 473                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 474                 break;
 475         case 3:
 476                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 477                 break;
 478         case 4:
 479                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 480                 break;
 481         }
 482
 483         if (!req->req.length)
 484                 return 1;
 485
 486         buf = req->req.buf + req->req.actual;
 487         bufferspace = req->req.length - req->req.actual;
 488         if (!bufferspace) {
 489                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 490                 return -1;
 491         }
 492
 493         udc_write(idx, S3C2410_UDC_INDEX_REG);
 494
 495         fifo_count = s3c2410_udc_fifo_count_out();
 496         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 497
 498         if (fifo_count > ep->ep.maxpacket)
 499                 avail = ep->ep.maxpacket;
 500         else
 501                 avail = fifo_count;
 502
 503         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 504
 505         /* checking this with ep0 is not accurate as we already
 506          * read a control request
 507          **/
 508         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 509                 is_last = 1;
 510                 /* overflowed this request?  flush extra data */
 511                 if (fifo_count != avail)
 512                         req->req.status = -EOVERFLOW;
 513         } else {
 514                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 515         }
 516
 517         udc_write(idx, S3C2410_UDC_INDEX_REG);
 518         fifo_count = s3c2410_udc_fifo_count_out();
 519
 520         /* Only ep0 debug messages are interesting */
 521         if (idx == 0)
 522                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 523                         __func__, fifo_count,is_last);
 524
 525         if (is_last) {
 526                 if (idx == 0) {
 527                         s3c2410_udc_set_ep0_de_out(base_addr);
 528                         ep->dev->ep0state = EP0_IDLE;
 529                 } else {
 530                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 531                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 532                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 533                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 534                                         S3C2410_UDC_OUT_CSR1_REG);
 535                 }
 536
 537                 s3c2410_udc_done(ep, req, 0);
 538         } else {
 539                 if (idx == 0) {
 540                         s3c2410_udc_clear_ep0_opr(base_addr);
 541                 } else {
 542                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 543                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 544                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 545                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 546                                         S3C2410_UDC_OUT_CSR1_REG);
 547                 }
 548         }
 549
 550         return is_last;
 551 }
 552
 553 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 554 {
 555         unsigned char *outbuf = (unsigned char*)crq;
 556         int bytes_read = 0;
 557
 558         udc_write(0, S3C2410_UDC_INDEX_REG);
 559
 560         bytes_read = s3c2410_udc_fifo_count_out();
 561
 562         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 563
 564         if (bytes_read > sizeof(struct usb_ctrlrequest))
 565                 bytes_read = sizeof(struct usb_ctrlrequest);
 566
 567         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 568
 569         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 570                 bytes_read, crq->bRequest, crq->bRequestType,
 571                 crq->wValue, crq->wIndex, crq->wLength);
 572
 573         return bytes_read;
 574 }
 575
 576 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 577                 struct usb_ctrlrequest *crq)
 578 {
 579         u16 status = 0;
 580         u8 ep_num = crq->wIndex & 0x7F;
 581         u8 is_in = crq->wIndex & USB_DIR_IN;
 582
 583         switch (crq->bRequestType & USB_RECIP_MASK) {
 584         case USB_RECIP_INTERFACE:
 585                 break;
 586
 587         case USB_RECIP_DEVICE:
 588                 status = dev->devstatus;
 589                 break;
 590
 591         case USB_RECIP_ENDPOINT:
 592                 if (ep_num > 4 || crq->wLength > 2)
 593                         return 1;
 594
 595                 if (ep_num == 0) {
 596                         udc_write(0, S3C2410_UDC_INDEX_REG);
 597                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 598                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 599                 } else {
 600                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 601                         if (is_in) {
 602                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 603                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 604                         } else {
 605                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 606                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 607                         }
 608                 }
 609
 610                 status = status ? 1 : 0;
 611                 break;
 612
 613         default:
 614                 return 1;
 615         }
 616
 617         /* Seems to be needed to get it working. ouch :( */
 618         udelay(5);
 619         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 620         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 621         s3c2410_udc_set_ep0_de_in(base_addr);
 622
 623         return 0;
 624 }
 625 /*------------------------- usb state machine -------------------------------*/
 626 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 627
 628 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 629                                         struct s3c2410_ep *ep,
 630                                         struct usb_ctrlrequest *crq,
 631                                         u32 ep0csr)
 632 {
 633         int len, ret, tmp;
 634
 635         /* start control request? */
 636         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 637                 return;
 638
 639         s3c2410_udc_nuke(dev, ep, -EPROTO);
 640
 641         len = s3c2410_udc_read_fifo_crq(crq);
 642         if (len != sizeof(*crq)) {
 643                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 644                         " wanted %d bytes got %d. Stalling out...\n",
 645                         sizeof(*crq), len);
 646                 s3c2410_udc_set_ep0_ss(base_addr);
 647                 return;
 648         }
 649
 650         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 651                 crq->bRequest, crq->bRequestType, crq->wLength);
 652
 653         /* cope with automagic for some standard requests. */
 654         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 655                 == USB_TYPE_STANDARD;
 656         dev->req_config = 0;
 657         dev->req_pending = 1;
 658
 659         switch (crq->bRequest) {
 660         case USB_REQ_SET_CONFIGURATION:
 661                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
 662
 663                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 664                         dev->req_config = 1;
 665                         s3c2410_udc_set_ep0_de_out(base_addr);
 666                 }
 667                 break;
 668
 669         case USB_REQ_SET_INTERFACE:
 670                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
 671
 672                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 673                         dev->req_config = 1;
 674                         s3c2410_udc_set_ep0_de_out(base_addr);
 675                 }
 676                 break;
 677
 678         case USB_REQ_SET_ADDRESS:
 679                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
 680
 681                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 682                         tmp = crq->wValue & 0x7F;
 683                         dev->address = tmp;
 684                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 685                                         S3C2410_UDC_FUNC_ADDR_REG);
 686                         s3c2410_udc_set_ep0_de_out(base_addr);
 687                         return;
 688                 }
 689                 break;
 690
 691         case USB_REQ_GET_STATUS:
 692                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
 693                 s3c2410_udc_clear_ep0_opr(base_addr);
 694
 695                 if (dev->req_std) {
 696                         if (!s3c2410_udc_get_status(dev, crq)) {
 697                                 return;
 698                         }
 699                 }
 700                 break;
 701
 702         case USB_REQ_CLEAR_FEATURE:
 703                 s3c2410_udc_clear_ep0_opr(base_addr);
 704
 705                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 706                         break;
 707
 708                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 709                         break;
 710
 711                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 712                 s3c2410_udc_set_ep0_de_out(base_addr);
 713                 return;
 714
 715         case USB_REQ_SET_FEATURE:
 716                 s3c2410_udc_clear_ep0_opr(base_addr);
 717
 718                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 719                         break;
 720
 721                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 722                         break;
 723
 724                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 725                 s3c2410_udc_set_ep0_de_out(base_addr);
 726                 return;
 727
 728         default:
 729                 s3c2410_udc_clear_ep0_opr(base_addr);
 730                 break;
 731         }
 732
 733         if (crq->bRequestType & USB_DIR_IN)
 734                 dev->ep0state = EP0_IN_DATA_PHASE;
 735         else
 736                 dev->ep0state = EP0_OUT_DATA_PHASE;
 737
 738         if (!dev->driver)
 739                 return;
 740
 741         /* deliver the request to the gadget driver */
 742         ret = dev->driver->setup(&dev->gadget, crq);
 743         if (ret < 0) {
 744                 if (dev->req_config) {
 745                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 746                                 crq->bRequest, ret);
 747                         return;
 748                 }
 749
 750                 if (ret == -EOPNOTSUPP)
 751                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 752                 else
 753                         dprintk(DEBUG_NORMAL,
 754                                 "dev->driver->setup failed. (%d)\n", ret);
 755
 756                 udelay(5);
 757                 s3c2410_udc_set_ep0_ss(base_addr);
 758                 s3c2410_udc_set_ep0_de_out(base_addr);
 759                 dev->ep0state = EP0_IDLE;
 760                 /* deferred i/o == no response yet */
 761         } else if (dev->req_pending) {
 762                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 763                 dev->req_pending=0;
 764         }
 765
 766         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 767 }
 768
 769 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 770 {
 771         u32                     ep0csr;
 772         struct s3c2410_ep       *ep = &dev->ep[0];
 773         struct s3c2410_request  *req;
 774         struct usb_ctrlrequest  crq;
 775
 776         if (list_empty(&ep->queue))
 777                 req = NULL;
 778         else
 779                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 780
 781         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 782          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 783
 784         udc_write(0, S3C2410_UDC_INDEX_REG);
 785         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 786
 787         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 788                 ep0csr, ep0states[dev->ep0state]);
 789
 790         /* clear stall status */
 791         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 792                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 793                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 794                 s3c2410_udc_clear_ep0_sst(base_addr);
 795                 dev->ep0state = EP0_IDLE;
 796                 return;
 797         }
 798
 799         /* clear setup end */
 800         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 801                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 802                 s3c2410_udc_nuke(dev, ep, 0);
 803                 s3c2410_udc_clear_ep0_se(base_addr);
 804                 dev->ep0state = EP0_IDLE;
 805         }
 806
 807         switch (dev->ep0state) {
 808         case EP0_IDLE:
 809                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 810                 break;
 811
 812         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 813                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 814                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
 815                         s3c2410_udc_write_fifo(ep, req);
 816                 }
 817                 break;
 818
 819         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
 820                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
 821                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
 822                         s3c2410_udc_read_fifo(ep,req);
 823                 }
 824                 break;
 825
 826         case EP0_END_XFER:
 827                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 828                 dev->ep0state = EP0_IDLE;
 829                 break;
 830
 831         case EP0_STALL:
 832                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 833                 dev->ep0state = EP0_IDLE;
 834                 break;
 835         }
 836 }
 837
 838 /*
 839  *      handle_ep - Manage I/O endpoints
 840  */
 841
 842 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 843 {
 844         struct s3c2410_request  *req;
 845         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 846         u32                     ep_csr1;
 847         u32                     idx;
 848
 849         if (likely (!list_empty(&ep->queue)))
 850                 req = list_entry(ep->queue.next,
 851                                 struct s3c2410_request, queue);
 852         else
 853                 req = NULL;
 854
 855         idx = ep->bEndpointAddress & 0x7F;
 856
 857         if (is_in) {
 858                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 859                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 860                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 861                         idx, ep_csr1, req ? 1 : 0);
 862
 863                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 864                         dprintk(DEBUG_VERBOSE, "st\n");
 865                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 866                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 867                                         S3C2410_UDC_IN_CSR1_REG);
 868                         return;
 869                 }
 870
 871                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
 872                         s3c2410_udc_write_fifo(ep,req);
 873                 }
 874         } else {
 875                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 876                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 877                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 878
 879                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 880                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 881                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 882                                         S3C2410_UDC_OUT_CSR1_REG);
 883                         return;
 884                 }
 885
 886                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
 887                         s3c2410_udc_read_fifo(ep,req);
 888                 }
 889         }
 890 }
 891
 892 #include <mach/regs-irq.h>
 893
 894 /*
 895  *      s3c2410_udc_irq - interrupt handler
 896  */
 897 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 898 {
 899         struct s3c2410_udc *dev = _dev;
 900         int usb_status;
 901         int usbd_status;
 902         int pwr_reg;
 903         int ep0csr;
 904         int i;
 905         u32 idx, idx2;
 906         unsigned long flags;
 907
 908         spin_lock_irqsave(&dev->lock, flags);
 909
 910         /* Driver connected ? */
 911         if (!dev->driver) {
 912                 /* Clear interrupts */
 913                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 914                                 S3C2410_UDC_USB_INT_REG);
 915                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 916                                 S3C2410_UDC_EP_INT_REG);
 917         }
 918
 919         /* Save index */
 920         idx = udc_read(S3C2410_UDC_INDEX_REG);
 921
 922         /* Read status registers */
 923         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 924         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 925         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 926
 927         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 928         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 929
 930         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 931                 usb_status, usbd_status, pwr_reg, ep0csr);
 932
 933         /*
 934          * Now, handle interrupts. There's two types :
 935          * - Reset, Resume, Suspend coming -> usb_int_reg
 936          * - EP -> ep_int_reg
 937          */
 938
 939         /* RESET */
 940         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 941                 /* two kind of reset :
 942                  * - reset start -> pwr reg = 8
 943                  * - reset end   -> pwr reg = 0
 944                  **/
 945                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 946                         ep0csr, pwr_reg);
 947
 948                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 949                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 950                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 951                                 S3C2410_UDC_MAXP_REG);
 952                 dev->address = 0;
 953
 954                 dev->ep0state = EP0_IDLE;
 955                 dev->gadget.speed = USB_SPEED_FULL;
 956
 957                 /* clear interrupt */
 958                 udc_write(S3C2410_UDC_USBINT_RESET,
 959                                 S3C2410_UDC_USB_INT_REG);
 960
 961                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 962                 spin_unlock_irqrestore(&dev->lock, flags);
 963                 return IRQ_HANDLED;
 964         }
 965
 966         /* RESUME */
 967         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 968                 dprintk(DEBUG_NORMAL, "USB resume\n");
 969
 970                 /* clear interrupt */
 971                 udc_write(S3C2410_UDC_USBINT_RESUME,
 972                                 S3C2410_UDC_USB_INT_REG);
 973
 974                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 975                                 && dev->driver
 976                                 && dev->driver->resume)
 977                         dev->driver->resume(&dev->gadget);
 978         }
 979
 980         /* SUSPEND */
 981         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 982                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 983
 984                 /* clear interrupt */
 985                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 986                                 S3C2410_UDC_USB_INT_REG);
 987
 988                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 989                                 && dev->driver
 990                                 && dev->driver->suspend)
 991                         dev->driver->suspend(&dev->gadget);
 992
 993                 dev->ep0state = EP0_IDLE;
 994         }
 995
 996         /* EP */
 997         /* control traffic */
 998         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
 999          * generate an interrupt
1000          */
1001         if (usbd_status & S3C2410_UDC_INT_EP0) {
1002                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
1003                 /* Clear the interrupt bit by setting it to 1 */
1004                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
1005                 s3c2410_udc_handle_ep0(dev);
1006         }
1007
1008         /* endpoint data transfers */
1009         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1010                 u32 tmp = 1 << i;
1011                 if (usbd_status & tmp) {
1012                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1013
1014                         /* Clear the interrupt bit by setting it to 1 */
1015                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1016                         s3c2410_udc_handle_ep(&dev->ep[i]);
1017                 }
1018         }
1019
1020         /* what else causes this interrupt? a receive! who is it? */
1021         if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
1022                 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1023                         idx2 = udc_read(S3C2410_UDC_INDEX_REG);
1024                         udc_write(i, S3C2410_UDC_INDEX_REG);
1025
1026                         if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
1027                                 s3c2410_udc_handle_ep(&dev->ep[i]);
1028
1029                         /* restore index */
1030                         udc_write(idx2, S3C2410_UDC_INDEX_REG);
1031                 }
1032         }
1033
1034         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1035
1036         /* Restore old index */
1037         udc_write(idx, S3C2410_UDC_INDEX_REG);
1038
1039         spin_unlock_irqrestore(&dev->lock, flags);
1040
1041         return IRQ_HANDLED;
1042 }
1043 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1044
1045 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1046 {
1047         return container_of(ep, struct s3c2410_ep, ep);
1048 }
1049
1050 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1051 {
1052         return container_of(gadget, struct s3c2410_udc, gadget);
1053 }
1054
1055 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1056 {
1057         return container_of(req, struct s3c2410_request, req);
1058 }
1059
1060 /*
1061  *      s3c2410_udc_ep_enable
1062  */
1063 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1064                                  const struct usb_endpoint_descriptor *desc)
1065 {
1066         struct s3c2410_udc      *dev;
1067         struct s3c2410_ep       *ep;
1068         u32                     max, tmp;
1069         unsigned long           flags;
1070         u32                     csr1,csr2;
1071         u32                     int_en_reg;
1072
1073         ep = to_s3c2410_ep(_ep);
1074
1075         if (!_ep || !desc || ep->desc
1076                         || _ep->name == ep0name
1077                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1078                 return -EINVAL;
1079
1080         dev = ep->dev;
1081         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1082                 return -ESHUTDOWN;
1083
1084         max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
1085
1086         local_irq_save (flags);
1087         _ep->maxpacket = max & 0x7ff;
1088         ep->desc = desc;
1089         ep->halted = 0;
1090         ep->bEndpointAddress = desc->bEndpointAddress;
1091
1092         /* set max packet */
1093         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1094         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1095
1096         /* set type, direction, address; reset fifo counters */
1097         if (desc->bEndpointAddress & USB_DIR_IN) {
1098                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1099                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1100
1101                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1102                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1103                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1104                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1105         } else {
1106                 /* don't flush in fifo or it will cause endpoint interrupt */
1107                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1108                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1109
1110                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1111                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1112                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1113                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1114
1115                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1116                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1117
1118                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1119                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1120                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1121                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1122         }
1123
1124         /* enable irqs */
1125         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1126         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1127
1128         /* print some debug message */
1129         tmp = desc->bEndpointAddress;
1130         dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1131                  _ep->name,ep->num, tmp,
1132                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1133
1134         local_irq_restore (flags);
1135         s3c2410_udc_set_halt(_ep, 0);
1136
1137         return 0;
1138 }
1139
1140 /*
1141  * s3c2410_udc_ep_disable
1142  */
1143 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1144 {
1145         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1146         unsigned long flags;
1147         u32 int_en_reg;
1148
1149         if (!_ep || !ep->desc) {
1150                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1151                         _ep ? ep->ep.name : NULL);
1152                 return -EINVAL;
1153         }
1154
1155         local_irq_save(flags);
1156
1157         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1158
1159         ep->desc = NULL;
1160         ep->halted = 1;
1161
1162         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1163
1164         /* disable irqs */
1165         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1166         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1167
1168         local_irq_restore(flags);
1169
1170         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1171
1172         return 0;
1173 }
1174
1175 /*
1176  * s3c2410_udc_alloc_request
1177  */
1178 static struct usb_request *
1179 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1180 {
1181         struct s3c2410_request *req;
1182
1183         dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1184
1185         if (!_ep)
1186                 return NULL;
1187
1188         req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1189         if (!req)
1190                 return NULL;
1191
1192         INIT_LIST_HEAD (&req->queue);
1193         return &req->req;
1194 }
1195
1196 /*
1197  * s3c2410_udc_free_request
1198  */
1199 static void
1200 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1201 {
1202         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1203         struct s3c2410_request  *req = to_s3c2410_req(_req);
1204
1205         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1206
1207         if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1208                 return;
1209
1210         WARN_ON (!list_empty (&req->queue));
1211         kfree(req);
1212 }
1213
1214 /*
1215  *      s3c2410_udc_queue
1216  */
1217 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1218                 gfp_t gfp_flags)
1219 {
1220         struct s3c2410_request  *req = to_s3c2410_req(_req);
1221         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1222         struct s3c2410_udc      *dev;
1223         u32                     ep_csr = 0;
1224         int                     fifo_count = 0;
1225         unsigned long           flags;
1226
1227         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1228                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1229                 return -EINVAL;
1230         }
1231
1232         dev = ep->dev;
1233         if (unlikely (!dev->driver
1234                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1235                 return -ESHUTDOWN;
1236         }
1237
1238         local_irq_save (flags);
1239
1240         if (unlikely(!_req || !_req->complete
1241                         || !_req->buf || !list_empty(&req->queue))) {
1242                 if (!_req)
1243                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1244                 else {
1245                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1246                                 __func__, !_req->complete,!_req->buf,
1247                                 !list_empty(&req->queue));
1248                 }
1249
1250                 local_irq_restore(flags);
1251                 return -EINVAL;
1252         }
1253
1254         _req->status = -EINPROGRESS;
1255         _req->actual = 0;
1256
1257         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1258                  __func__, ep->bEndpointAddress, _req->length);
1259
1260         if (ep->bEndpointAddress) {
1261                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1262
1263                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1264                                 ? S3C2410_UDC_IN_CSR1_REG
1265                                 : S3C2410_UDC_OUT_CSR1_REG);
1266                 fifo_count = s3c2410_udc_fifo_count_out();
1267         } else {
1268                 udc_write(0, S3C2410_UDC_INDEX_REG);
1269                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1270                 fifo_count = s3c2410_udc_fifo_count_out();
1271         }
1272
1273         /* kickstart this i/o queue? */
1274         if (list_empty(&ep->queue) && !ep->halted) {
1275                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1276                         switch (dev->ep0state) {
1277                         case EP0_IN_DATA_PHASE:
1278                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1279                                                 && s3c2410_udc_write_fifo(ep,
1280                                                         req)) {
1281                                         dev->ep0state = EP0_IDLE;
1282                                         req = NULL;
1283                                 }
1284                                 break;
1285
1286                         case EP0_OUT_DATA_PHASE:
1287                                 if ((!_req->length)
1288                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1289                                                 && s3c2410_udc_read_fifo(ep,
1290                                                         req))) {
1291                                         dev->ep0state = EP0_IDLE;
1292                                         req = NULL;
1293                                 }
1294                                 break;
1295
1296                         default:
1297                                 local_irq_restore(flags);
1298                                 return -EL2HLT;
1299                         }
1300                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1301                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1302                                 && s3c2410_udc_write_fifo(ep, req)) {
1303                         req = NULL;
1304                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1305                                 && fifo_count
1306                                 && s3c2410_udc_read_fifo(ep, req)) {
1307                         req = NULL;
1308                 }
1309         }
1310
1311         /* pio or dma irq handler advances the queue. */
1312         if (likely (req != 0))
1313                 list_add_tail(&req->queue, &ep->queue);
1314
1315         local_irq_restore(flags);
1316
1317         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1318         return 0;
1319 }
1320
1321 /*
1322  *      s3c2410_udc_dequeue
1323  */
1324 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1325 {
1326         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1327         struct s3c2410_udc      *udc;
1328         int                     retval = -EINVAL;
1329         unsigned long           flags;
1330         struct s3c2410_request  *req = NULL;
1331
1332         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1333
1334         if (!the_controller->driver)
1335                 return -ESHUTDOWN;
1336
1337         if (!_ep || !_req)
1338                 return retval;
1339
1340         udc = to_s3c2410_udc(ep->gadget);
1341
1342         local_irq_save (flags);
1343
1344         list_for_each_entry (req, &ep->queue, queue) {
1345                 if (&req->req == _req) {
1346                         list_del_init (&req->queue);
1347                         _req->status = -ECONNRESET;
1348                         retval = 0;
1349                         break;
1350                 }
1351         }
1352
1353         if (retval == 0) {
1354                 dprintk(DEBUG_VERBOSE,
1355                         "dequeued req %p from %s, len %d buf %p\n",
1356                         req, _ep->name, _req->length, _req->buf);
1357
1358                 s3c2410_udc_done(ep, req, -ECONNRESET);
1359         }
1360
1361         local_irq_restore (flags);
1362         return retval;
1363 }
1364
1365 /*
1366  * s3c2410_udc_set_halt
1367  */
1368 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1369 {
1370         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1371         u32                     ep_csr = 0;
1372         unsigned long           flags;
1373         u32                     idx;
1374
1375         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1376                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1377                 return -EINVAL;
1378         }
1379
1380         local_irq_save (flags);
1381
1382         idx = ep->bEndpointAddress & 0x7F;
1383
1384         if (idx == 0) {
1385                 s3c2410_udc_set_ep0_ss(base_addr);
1386                 s3c2410_udc_set_ep0_de_out(base_addr);
1387         } else {
1388                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1389                 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1390                                 ? S3C2410_UDC_IN_CSR1_REG
1391                                 : S3C2410_UDC_OUT_CSR1_REG);
1392
1393                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1394                         if (value)
1395                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1396                                         S3C2410_UDC_IN_CSR1_REG);
1397                         else {
1398                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1399                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1400                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1401                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1402                         }
1403                 } else {
1404                         if (value)
1405                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1406                                         S3C2410_UDC_OUT_CSR1_REG);
1407                         else {
1408                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1409                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1410                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1411                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1412                         }
1413                 }
1414         }
1415
1416         ep->halted = value ? 1 : 0;
1417         local_irq_restore (flags);
1418
1419         return 0;
1420 }
1421
1422 static const struct usb_ep_ops s3c2410_ep_ops = {
1423         .enable         = s3c2410_udc_ep_enable,
1424         .disable        = s3c2410_udc_ep_disable,
1425
1426         .alloc_request  = s3c2410_udc_alloc_request,
1427         .free_request   = s3c2410_udc_free_request,
1428
1429         .queue          = s3c2410_udc_queue,
1430         .dequeue        = s3c2410_udc_dequeue,
1431
1432         .set_halt       = s3c2410_udc_set_halt,
1433 };
1434
1435 /*------------------------- usb_gadget_ops ----------------------------------*/
1436
1437 /*
1438  *      s3c2410_udc_get_frame
1439  */
1440 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1441 {
1442         int tmp;
1443
1444         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1445
1446         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1447         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1448         return tmp;
1449 }
1450
1451 /*
1452  *      s3c2410_udc_wakeup
1453  */
1454 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1455 {
1456         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1457         return 0;
1458 }
1459
1460 /*
1461  *      s3c2410_udc_set_selfpowered
1462  */
1463 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1464 {
1465         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1466
1467         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1468
1469         if (value)
1470                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1471         else
1472                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1473
1474         return 0;
1475 }
1476
1477 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1478 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1479
1480 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1481 {
1482         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1483
1484         if (udc_info && (udc_info->udc_command ||
1485                 gpio_is_valid(udc_info->pullup_pin))) {
1486
1487                 if (is_on)
1488                         s3c2410_udc_enable(udc);
1489                 else {
1490                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1491                                 if (udc->driver && udc->driver->disconnect)
1492                                         udc->driver->disconnect(&udc->gadget);
1493
1494                         }
1495                         s3c2410_udc_disable(udc);
1496                 }
1497         }
1498         else
1499                 return -EOPNOTSUPP;
1500
1501         return 0;
1502 }
1503
1504 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1505 {
1506         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1507
1508         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1509
1510         udc->vbus = (is_active != 0);
1511         s3c2410_udc_set_pullup(udc, is_active);
1512         return 0;
1513 }
1514
1515 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1516 {
1517         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1518
1519         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1520
1521         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1522         return 0;
1523 }
1524
1525 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1526 {
1527         struct s3c2410_udc      *dev = _dev;
1528         unsigned int            value;
1529
1530         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1531
1532         value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1533         if (udc_info->vbus_pin_inverted)
1534                 value = !value;
1535
1536         if (value != dev->vbus)
1537                 s3c2410_udc_vbus_session(&dev->gadget, value);
1538
1539         return IRQ_HANDLED;
1540 }
1541
1542 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1543 {
1544         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1545
1546         if (udc_info && udc_info->vbus_draw) {
1547                 udc_info->vbus_draw(ma);
1548                 return 0;
1549         }
1550
1551         return -ENOTSUPP;
1552 }
1553
1554 static const struct usb_gadget_ops s3c2410_ops = {
1555         .get_frame              = s3c2410_udc_get_frame,
1556         .wakeup                 = s3c2410_udc_wakeup,
1557         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1558         .pullup                 = s3c2410_udc_pullup,
1559         .vbus_session           = s3c2410_udc_vbus_session,
1560         .vbus_draw              = s3c2410_vbus_draw,
1561 };
1562
1563 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1564 {
1565         if (!udc_info)
1566                 return;
1567
1568         if (udc_info->udc_command) {
1569                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1570         } else if (gpio_is_valid(udc_info->pullup_pin)) {
1571                 int value;
1572
1573                 switch (cmd) {
1574                 case S3C2410_UDC_P_ENABLE:
1575                         value = 1;
1576                         break;
1577                 case S3C2410_UDC_P_DISABLE:
1578                         value = 0;
1579                         break;
1580                 default:
1581                         return;
1582                 }
1583                 value ^= udc_info->pullup_pin_inverted;
1584
1585                 gpio_set_value(udc_info->pullup_pin, value);
1586         }
1587 }
1588
1589 /*------------------------- gadget driver handling---------------------------*/
1590 /*
1591  * s3c2410_udc_disable
1592  */
1593 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1594 {
1595         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1596
1597         /* Disable all interrupts */
1598         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1599         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1600
1601         /* Clear the interrupt registers */
1602         udc_write(S3C2410_UDC_USBINT_RESET
1603                                 | S3C2410_UDC_USBINT_RESUME
1604                                 | S3C2410_UDC_USBINT_SUSPEND,
1605                         S3C2410_UDC_USB_INT_REG);
1606
1607         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1608
1609         /* Good bye, cruel world */
1610         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1611
1612         /* Set speed to unknown */
1613         dev->gadget.speed = USB_SPEED_UNKNOWN;
1614 }
1615
1616 /*
1617  * s3c2410_udc_reinit
1618  */
1619 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1620 {
1621         u32 i;
1622
1623         /* device/ep0 records init */
1624         INIT_LIST_HEAD (&dev->gadget.ep_list);
1625         INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1626         dev->ep0state = EP0_IDLE;
1627
1628         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1629                 struct s3c2410_ep *ep = &dev->ep[i];
1630
1631                 if (i != 0)
1632                         list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1633
1634                 ep->dev = dev;
1635                 ep->desc = NULL;
1636                 ep->halted = 0;
1637                 INIT_LIST_HEAD (&ep->queue);
1638         }
1639 }
1640
1641 /*
1642  * s3c2410_udc_enable
1643  */
1644 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1645 {
1646         int i;
1647
1648         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1649
1650         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1651         dev->gadget.speed = USB_SPEED_FULL;
1652
1653         /* Set MAXP for all endpoints */
1654         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1655                 udc_write(i, S3C2410_UDC_INDEX_REG);
1656                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1657                                 S3C2410_UDC_MAXP_REG);
1658         }
1659
1660         /* Set default power state */
1661         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1662
1663         /* Enable reset and suspend interrupt interrupts */
1664         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1665                         S3C2410_UDC_USB_INT_EN_REG);
1666
1667         /* Enable ep0 interrupt */
1668         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1669
1670         /* time to say "hello, world" */
1671         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1672 }
1673
1674 /*
1675  *      usb_gadget_probe_driver
1676  */
1677 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1678                 int (*bind)(struct usb_gadget *))
1679 {
1680         struct s3c2410_udc *udc = the_controller;
1681         int             retval;
1682
1683         dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1684
1685         /* Sanity checks */
1686         if (!udc)
1687                 return -ENODEV;
1688
1689         if (udc->driver)
1690                 return -EBUSY;
1691
1692         if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
1693                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1694                         bind, driver->setup, driver->speed);
1695                 return -EINVAL;
1696         }
1697 #if defined(MODULE)
1698         if (!driver->unbind) {
1699                 printk(KERN_ERR "Invalid driver: no unbind method\n");
1700                 return -EINVAL;
1701         }
1702 #endif
1703
1704         /* Hook the driver */
1705         udc->driver = driver;
1706         udc->gadget.dev.driver = &driver->driver;
1707
1708         /* Bind the driver */
1709         if ((retval = device_add(&udc->gadget.dev)) != 0) {
1710                 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1711                 goto register_error;
1712         }
1713
1714         dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1715                 driver->driver.name);
1716
1717         if ((retval = bind(&udc->gadget)) != 0) {
1718                 device_del(&udc->gadget.dev);
1719                 goto register_error;
1720         }
1721
1722         /* Enable udc */
1723         s3c2410_udc_enable(udc);
1724
1725         return 0;
1726
1727 register_error:
1728         udc->driver = NULL;
1729         udc->gadget.dev.driver = NULL;
1730         return retval;
1731 }
1732 EXPORT_SYMBOL(usb_gadget_probe_driver);
1733
1734 /*
1735  *      usb_gadget_unregister_driver
1736  */
1737 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1738 {
1739         struct s3c2410_udc *udc = the_controller;
1740
1741         if (!udc)
1742                 return -ENODEV;
1743
1744         if (!driver || driver != udc->driver || !driver->unbind)
1745                 return -EINVAL;
1746
1747         dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1748                 driver->driver.name);
1749
1750         /* report disconnect */
1751         if (driver->disconnect)
1752                 driver->disconnect(&udc->gadget);
1753
1754         driver->unbind(&udc->gadget);
1755
1756         device_del(&udc->gadget.dev);
1757         udc->driver = NULL;
1758
1759         /* Disable udc */
1760         s3c2410_udc_disable(udc);
1761
1762         return 0;
1763 }
1764
1765 /*---------------------------------------------------------------------------*/
1766 static struct s3c2410_udc memory = {
1767         .gadget = {
1768                 .ops            = &s3c2410_ops,
1769                 .ep0            = &memory.ep[0].ep,
1770                 .name           = gadget_name,
1771                 .dev = {
1772                         .init_name      = "gadget",
1773                 },
1774         },
1775
1776         /* control endpoint */
1777         .ep[0] = {
1778                 .num            = 0,
1779                 .ep = {
1780                         .name           = ep0name,
1781                         .ops            = &s3c2410_ep_ops,
1782                         .maxpacket      = EP0_FIFO_SIZE,
1783                 },
1784                 .dev            = &memory,
1785         },
1786
1787         /* first group of endpoints */
1788         .ep[1] = {
1789                 .num            = 1,
1790                 .ep = {
1791                         .name           = "ep1-bulk",
1792                         .ops            = &s3c2410_ep_ops,
1793                         .maxpacket      = EP_FIFO_SIZE,
1794                 },
1795                 .dev            = &memory,
1796                 .fifo_size      = EP_FIFO_SIZE,
1797                 .bEndpointAddress = 1,
1798                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1799         },
1800         .ep[2] = {
1801                 .num            = 2,
1802                 .ep = {
1803                         .name           = "ep2-bulk",
1804                         .ops            = &s3c2410_ep_ops,
1805                         .maxpacket      = EP_FIFO_SIZE,
1806                 },
1807                 .dev            = &memory,
1808                 .fifo_size      = EP_FIFO_SIZE,
1809                 .bEndpointAddress = 2,
1810                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1811         },
1812         .ep[3] = {
1813                 .num            = 3,
1814                 .ep = {
1815                         .name           = "ep3-bulk",
1816                         .ops            = &s3c2410_ep_ops,
1817                         .maxpacket      = EP_FIFO_SIZE,
1818                 },
1819                 .dev            = &memory,
1820                 .fifo_size      = EP_FIFO_SIZE,
1821                 .bEndpointAddress = 3,
1822                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1823         },
1824         .ep[4] = {
1825                 .num            = 4,
1826                 .ep = {
1827                         .name           = "ep4-bulk",
1828                         .ops            = &s3c2410_ep_ops,
1829                         .maxpacket      = EP_FIFO_SIZE,
1830                 },
1831                 .dev            = &memory,
1832                 .fifo_size      = EP_FIFO_SIZE,
1833                 .bEndpointAddress = 4,
1834                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1835         }
1836
1837 };
1838
1839 /*
1840  *      probe - binds to the platform device
1841  */
1842 static int s3c2410_udc_probe(struct platform_device *pdev)
1843 {
1844         struct s3c2410_udc *udc = &memory;
1845         struct device *dev = &pdev->dev;
1846         int retval;
1847         int irq;
1848
1849         dev_dbg(dev, "%s()\n", __func__);
1850
1851         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1852         if (IS_ERR(usb_bus_clock)) {
1853                 dev_err(dev, "failed to get usb bus clock source\n");
1854                 return PTR_ERR(usb_bus_clock);
1855         }
1856
1857         clk_enable(usb_bus_clock);
1858
1859         udc_clock = clk_get(NULL, "usb-device");
1860         if (IS_ERR(udc_clock)) {
1861                 dev_err(dev, "failed to get udc clock source\n");
1862                 return PTR_ERR(udc_clock);
1863         }
1864
1865         clk_enable(udc_clock);
1866
1867         mdelay(10);
1868
1869         dev_dbg(dev, "got and enabled clocks\n");
1870
1871         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1872                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1873                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1874                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1875                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1876                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1877         }
1878
1879         spin_lock_init (&udc->lock);
1880         udc_info = pdev->dev.platform_data;
1881
1882         rsrc_start = S3C2410_PA_USBDEV;
1883         rsrc_len   = S3C24XX_SZ_USBDEV;
1884
1885         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1886                 return -EBUSY;
1887
1888         base_addr = ioremap(rsrc_start, rsrc_len);
1889         if (!base_addr) {
1890                 retval = -ENOMEM;
1891                 goto err_mem;
1892         }
1893
1894         device_initialize(&udc->gadget.dev);
1895         udc->gadget.dev.parent = &pdev->dev;
1896         udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1897
1898         the_controller = udc;
1899         platform_set_drvdata(pdev, udc);
1900
1901         s3c2410_udc_disable(udc);
1902         s3c2410_udc_reinit(udc);
1903
1904         /* irq setup after old hardware state is cleaned up */
1905         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1906                              IRQF_DISABLED, gadget_name, udc);
1907
1908         if (retval != 0) {
1909                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1910                 retval = -EBUSY;
1911                 goto err_map;
1912         }
1913
1914         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1915
1916         if (udc_info && udc_info->vbus_pin > 0) {
1917                 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1918                 if (retval < 0) {
1919                         dev_err(dev, "cannot claim vbus pin\n");
1920                         goto err_int;
1921                 }
1922
1923                 irq = gpio_to_irq(udc_info->vbus_pin);
1924                 if (irq < 0) {
1925                         dev_err(dev, "no irq for gpio vbus pin\n");
1926                         goto err_gpio_claim;
1927                 }
1928
1929                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1930                                      IRQF_DISABLED | IRQF_TRIGGER_RISING
1931                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1932                                      gadget_name, udc);
1933
1934                 if (retval != 0) {
1935                         dev_err(dev, "can't get vbus irq %d, err %d\n",
1936                                 irq, retval);
1937                         retval = -EBUSY;
1938                         goto err_gpio_claim;
1939                 }
1940
1941                 dev_dbg(dev, "got irq %i\n", irq);
1942         } else {
1943                 udc->vbus = 1;
1944         }
1945
1946         if (udc_info && !udc_info->udc_command &&
1947                 gpio_is_valid(udc_info->pullup_pin)) {
1948
1949                 retval = gpio_request_one(udc_info->pullup_pin,
1950                                 udc_info->vbus_pin_inverted ?
1951                                 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1952                                 "udc pullup");
1953                 if (retval)
1954                         goto err_vbus_irq;
1955         }
1956
1957         if (s3c2410_udc_debugfs_root) {
1958                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1959                                 s3c2410_udc_debugfs_root,
1960                                 udc, &s3c2410_udc_debugfs_fops);
1961                 if (!udc->regs_info)
1962                         dev_warn(dev, "debugfs file creation failed\n");
1963         }
1964
1965         dev_dbg(dev, "probe ok\n");
1966
1967         return 0;
1968
1969 err_vbus_irq:
1970         if (udc_info && udc_info->vbus_pin > 0)
1971                 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1972 err_gpio_claim:
1973         if (udc_info && udc_info->vbus_pin > 0)
1974                 gpio_free(udc_info->vbus_pin);
1975 err_int:
1976         free_irq(IRQ_USBD, udc);
1977 err_map:
1978         iounmap(base_addr);
1979 err_mem:
1980         release_mem_region(rsrc_start, rsrc_len);
1981
1982         return retval;
1983 }
1984
1985 /*
1986  *      s3c2410_udc_remove
1987  */
1988 static int s3c2410_udc_remove(struct platform_device *pdev)
1989 {
1990         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1991         unsigned int irq;
1992
1993         dev_dbg(&pdev->dev, "%s()\n", __func__);
1994         if (udc->driver)
1995                 return -EBUSY;
1996
1997         debugfs_remove(udc->regs_info);
1998
1999         if (udc_info && !udc_info->udc_command &&
2000                 gpio_is_valid(udc_info->pullup_pin))
2001                 gpio_free(udc_info->pullup_pin);
2002
2003         if (udc_info && udc_info->vbus_pin > 0) {
2004                 irq = gpio_to_irq(udc_info->vbus_pin);
2005                 free_irq(irq, udc);
2006         }
2007
2008         free_irq(IRQ_USBD, udc);
2009
2010         iounmap(base_addr);
2011         release_mem_region(rsrc_start, rsrc_len);
2012
2013         platform_set_drvdata(pdev, NULL);
2014
2015         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
2016                 clk_disable(udc_clock);
2017                 clk_put(udc_clock);
2018                 udc_clock = NULL;
2019         }
2020
2021         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
2022                 clk_disable(usb_bus_clock);
2023                 clk_put(usb_bus_clock);
2024                 usb_bus_clock = NULL;
2025         }
2026
2027         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
2028         return 0;
2029 }
2030
2031 #ifdef CONFIG_PM
2032 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
2033 {
2034         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
2035
2036         return 0;
2037 }
2038
2039 static int s3c2410_udc_resume(struct platform_device *pdev)
2040 {
2041         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
2042
2043         return 0;
2044 }
2045 #else
2046 #define s3c2410_udc_suspend     NULL
2047 #define s3c2410_udc_resume      NULL
2048 #endif
2049
2050 static struct platform_driver udc_driver_2410 = {
2051         .driver         = {
2052                 .name   = "s3c2410-usbgadget",
2053                 .owner  = THIS_MODULE,
2054         },
2055         .probe          = s3c2410_udc_probe,
2056         .remove         = s3c2410_udc_remove,
2057         .suspend        = s3c2410_udc_suspend,
2058         .resume         = s3c2410_udc_resume,
2059 };
2060
2061 static struct platform_driver udc_driver_2440 = {
2062         .driver         = {
2063                 .name   = "s3c2440-usbgadget",
2064                 .owner  = THIS_MODULE,
2065         },
2066         .probe          = s3c2410_udc_probe,
2067         .remove         = s3c2410_udc_remove,
2068         .suspend        = s3c2410_udc_suspend,
2069         .resume         = s3c2410_udc_resume,
2070 };
2071
2072 static int __init udc_init(void)
2073 {
2074         int retval;
2075
2076         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2077
2078         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2079         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2080                 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2081                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2082                 s3c2410_udc_debugfs_root = NULL;
2083         }
2084
2085         retval = platform_driver_register(&udc_driver_2410);
2086         if (retval)
2087                 goto err;
2088
2089         retval = platform_driver_register(&udc_driver_2440);
2090         if (retval)
2091                 goto err;
2092
2093         return 0;
2094
2095 err:
2096         debugfs_remove(s3c2410_udc_debugfs_root);
2097         return retval;
2098 }
2099
2100 static void __exit udc_exit(void)
2101 {
2102         platform_driver_unregister(&udc_driver_2410);
2103         platform_driver_unregister(&udc_driver_2440);
2104         debugfs_remove(s3c2410_udc_debugfs_root);
2105 }
2106
2107 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2108
2109 module_init(udc_init);
2110 module_exit(udc_exit);
2111
2112 MODULE_AUTHOR(DRIVER_AUTHOR);
2113 MODULE_DESCRIPTION(DRIVER_DESC);
2114 MODULE_VERSION(DRIVER_VERSION);
2115 MODULE_LICENSE("GPL");
2116 MODULE_ALIAS("platform:s3c2410-usbgadget");
2117 MODULE_ALIAS("platform:s3c2440-usbgadget");